Calamari, referring to squid prepared as food, in its natural state, is inherently devoid of gluten. This is because squid, as a sea creature, does not contain the proteins that constitute gluten. A simple example is grilled squid seasoned only with salt, pepper, and lemon; this preparation remains gluten-free.
The suitability of calamari for individuals adhering to a gluten-free diet is significantly influenced by preparation methods. Many commercial preparations involve breading or battering the squid before frying. These coatings frequently utilize wheat flour, a primary source of gluten. Consequently, traditionally prepared fried calamari is often unsuitable for those with celiac disease or gluten intolerance.